Pasting, swelling and solubility properties of UV initiated starch-graft-poly(AA)

Lee, Jau Shya and Ramamurti, N. Kumar and Rozman H. D. and B. M. N. M. Azemi (2005) Pasting, swelling and solubility properties of UV initiated starch-graft-poly(AA). Food Chemistry, 91 (2). pp. 203-211. ISSN 0308-8146

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Abstract

UV-initiated graft copolymerization of sago starch with acrylic acid (AA) at low level (2.5%, 5%, 7.5% and 10% w/w) was investigated. The UV curing technique and procedure was found to successfully produce starch-graft-poly(acrylic acid) [S-g-poly(AA)]. The carboxyl group content was found to increase with increasing % of monomer. Rapid visco-analyzer (RVA) pasting profile, swelling and solubility of the samples were studied. UV irradiation of sago starch (control) results in high pasting temperature, high peak viscosity and high setback, besides retarding swelling and solubility as compared to the native untreated starch (p<0.05). Pasting temperature was decreased after grafting as compared to the control. S-g-poly(AA) showed higher peak viscosity, peak time and setback than native untreated starch (p<0.05). Breakdown was retarded at 2.5% S-g-poly(AA) but increased at 10%. S-g-poly(AA) exhibited lower swelling power and solubility than the native sample (p<0.05).

Item Type: Article
Uncontrolled Keywords: Pasting, Swelling, Solubility properties of UV initiated starch-graft-poly(AA)
Subjects: Q Science > QD Chemistry > QD1-999 Chemistry > QD241-441 Organic chemistry
T Technology > TX Home economics > TX1-1110 Home economics > TX341-641 Nutrition. Foods and food supply
Divisions: SCHOOL > School of Food Science and Nutrition
Depositing User: ADMIN ADMIN
Date Deposited: 06 May 2011 15:32
Last Modified: 16 Oct 2017 13:34
URI: http://eprints.ums.edu.my/id/eprint/2942

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